The role of early voice therapy in the incidence of motility recovery in unilateral vocal fold paralysis

Abstract

Objectives. Vocal fold paralysis can have a significant impact on a patient's quality of life. The aim of this study was to analyze, in terms of vocal improvement and motility recovery, the post-vocal treatment results of patients with unilateral vocal fold paralysis (UVFP) who underwent early voice therapy. Study design. A 7 years prospective study of patients with an UVFP who underwent our multidimensional diagnostic-therapeutic assessment. Material and Methods. Seventy-four patients with UVFP were included in the study. All patients underwent a voice therapy based on forcible exercises supplemented by manipulations and maneuvers. A pre and post-treatment objective voice evaluation and self-assessment was made. Results: Out of 74 patients with UVFP, 51 (68.9%) recovered vocal fold motility. In 23 (31.1%), UVFP persisted after voice therapy. In this group of patients, a complete glottal closure was seen in 5 before voice therapy and in 13 after; An important and significant (p <0.0001) reduction in fundamental frequency (Fo) was found; a manifest improvement was seen for the mean values of Jitter (Jitt%; p = 0.001), Shimmer (Shim%; p <0.0001) and noise-to-harmonic ratio (NHR) (p <0.0001). The same statistical comparisons calculated for male patients alone was not significant for Jitt% (0.102), Shim% (0.112) and NHR (0.155), as a result of the reduced number of patients in this group. Voice Handicap Index (VHI) values showed a clear and significant improvement and mean maximum phonation time (MPT) increased significantly. Conclusion. Early voice therapy based on an energetic approach, combined with patient co-operation, motivation and understanding through educated participation in the voice restoration process, strengthen the idea that patients with UVFP have a good chance of recovering vocal fold motility or improving their voice quality.